15% Carbamide Peroxide가 심미수복재의 표면조도와 착색에 미치는 영향
The Effect of 15% Carbamide Peroxide on the Surface Roughness and Staining of Esthetic Restoratives
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초록
The purpose of this study was to evaluate the surface change after 15% carbamide peroxide home bleaching to various restorative materials (composite resin [CR], resin modified glass ionomer [RMGI] and glass ionomer [GI]) and to observe the effect of surface condition of the materials on re-staining. Three esthetic restorative materials (Filtek Z250, 3M, USA; Fuji II LC, GC, Japan; Fuji II, GC, Japan) were used in this study. Twenty specimens per material group were made and divided into two groups (bleached and control). The specimens were immersed in coffee after applying bleaching agent. The color change and surface roughness were measured before and after bleaching and after immersion in coffee. The data were analyzed with SPSS 18.0. The results were as follows: 1. The color of all experiment groups was significantly changed after bleaching (p＜0.05). RMGI was the greatest value of ∆E* and ∆L*. GI and CR groups were in ordering (p＜0.05). The ∆a* value was decreased GI, RMGI and CR. RMGI was only significantly decreased in ∆b* value (p＜0.05). 2. The surface roughness before and after bleaching was significantly different on CR, RMGI and GI (p＜0.05). 3. After staining with coffee, the value of ∆E* was increased in GI, RMGI and CR, furthermore GI and RMGI showed significant difference in the bleaching groups (p＜0.05). The ∆L* value of GI and RMGI was significantly decreased. 4. The change of surface roughness after staining was not significantly different in all groups (p＞0.05). The maintenance of color stability in esthetic restorations is one of the most important properties. Tooth whitening is for the aesthetic. Therefore, dental professionals should notice to patients about re-staining after tooth whitening. They should give an instruction that how to prevent and which kinds of agents could be stained.
Abstract
The purpose of this study was to evaluate the surface change after 15% carbamide peroxide home bleaching to various restorative materials (composite resin [CR], resin modified glass ionomer [RMGI] and glass ionomer [GI]) and to observe the effect of surface condition of the materials on re-staining. Three esthetic restorative materials (Filtek Z250, 3M, USA; Fuji II LC, GC, Japan; Fuji II, GC, Japan) were used in this study. Twenty specimens per material group were made and divided into two groups (bleached and control). The specimens were immersed in coffee after applying bleaching agent. The color change and surface roughness were measured before and after bleaching and after immersion in coffee. The data were analyzed with SPSS 18.0. The results were as follows: 1. The color of all experiment groups was significantly changed after bleaching (p＜0.05). RMGI was the greatest value of ∆E* and ∆L*. GI and CR groups were in ordering (p＜0.05). The ∆a* value was decreased GI, RMGI and CR. RMGI was only significantly decreased in ∆b* value (p＜0.05). 2. The surface roughness before and after bleaching was significantly different on CR, RMGI and GI (p＜0.05). 3. After staining with coffee, the value of ∆E* was increased in GI, RMGI and CR, furthermore GI and RMGI showed significant difference in the bleaching groups (p＜0.05). The ∆L* value of GI and RMGI was significantly decreased. 4. The change of surface roughness after staining was not significantly different in all groups (p＞0.05). The maintenance of color stability in esthetic restorations is one of the most important properties. Tooth whitening is for the aesthetic. Therefore, dental professionals should notice to patients about re-staining after tooth whitening. They should give an instruction that how to prevent and which kinds of agents could be stained.
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